Control 'DropDownList1' of type 'DropDownList' must be placed inside a form
tag with runat=server.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Control 'DropDownList1' of type
'DropDownList' must be placed inside a form tag with runat=server.

Source Error:

An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of the
exception can be identified using the exception stack trace below.

Stack Trace:

[HttpException (0x80004005): Control 'DropDownList1' of type 'DropDownList'
must be placed inside a form tag with runat=server.]
System.Web.UI.Page.VerifyRenderingInServerForm(Control control) +151

Control 'DropDownList1' of type 'DropDownList' must be placed inside a
form
tag with runat=server.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Control 'DropDownList1' of
type
'DropDownList' must be placed inside a form tag with runat=server.

Source Error:

An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of the
exception can be identified using the exception stack trace below.

Stack Trace:

[HttpException (0x80004005): Control 'DropDownList1' of type
'DropDownList'
must be placed inside a form tag with runat=server.]
System.Web.UI.Page.VerifyRenderingInServerForm(Control control) +151